scholarly journals Numerical Simulation of Polymer Dispersion Systems for Polymer Injection on Offshore Platforms

ACS Omega ◽  
2020 ◽  
Vol 5 (32) ◽  
pp. 20343-20352
Author(s):  
Zizhen Wang ◽  
Tianyang Li ◽  
Fangxiang Wang ◽  
Lin Guan ◽  
Rui Zhang
Keyword(s):  
Numerical Simulation ◽  
Offshore Platforms ◽  
Polymer Dispersion ◽  
Polymer Injection ◽  
Dispersion Systems

scholarly journals EVALUATION OF ALTERNATE WATER-POLYMER INJECTION PARAMETERS USING NUMERICAL SIMULATION

2019 ◽  
Vol 13 (2) ◽  
pp. 093-102
Author(s):  
V. E. Botechia ◽  
C. E. A. G. Barreto ◽  
L. F. Lamas ◽  
D. J. Schiozer
Keyword(s):  
Numerical Simulation ◽  
Polymer Injection ◽  
Injection Parameters

Numerical and Experimental Studies of Residual Stresses in Multipass Welding of High Strength Shipbuilding Steel

2015 ◽  
Vol 59 (03) ◽  
pp. 133-144
Author(s):  
Guangming Fu ◽  
Tetyana Gurova ◽  
Marcelo I. Lourenco ◽  
Segen F. Estefen
Keyword(s):  
Neural Network ◽  
Numerical Simulation ◽  
Heat Source ◽  
Residual Stresses ◽  
Experimental Studies ◽  
Source Model ◽  
Fe Model ◽  
Offshore Platforms ◽  
Heat Source Model ◽  
Shipbuilding Industry

The article contributes, through numerical simulation based on models calibrated by experimental results, to better estimate residual stresses and distortions in welded structures representatives of ships and offshore platforms considering welding procedures relevant to shipyard current practices. A multi-pass welding is carried out to investigate the residual stresses in laboratory tests. The temperature at several positions on a plate sample is recorded with thermocouples and residual stresses are measured using an x-ray diffraction technique. Finite element (FE) models are developed in this study and experimentally validated. The three dimensional (3D) moving Goldak's double-ellipsoidal heat source model is employed in the simulations. A Levenberg-Marquardt neural network algorithm is employed to determine the geometric parameters of the heat source model. The technique based on neural network is applied to dimension the heat source later employed in the thermal analysis using 2D FE model to reduce the computer time of the numerical simulation and to make it feasible for shipbuilding industry applications. The numerical results of temperature and residual stress distribution are correlated with the experimental measurements. Finally, the effects of preheat and interpass temperatures on the residual stresses are investigated using numerical simulation. The effects of the transient releasing temperature on the residual stresses are also discussed.

The Research of on the Limit of Permeability Contrast for Separated Quality Polymer Injection by Numerical Simulation Technology

2014 ◽  
Vol 584-586 ◽  
pp. 1761-1767
Author(s):  
Li Yang Song ◽  
Ji Cheng Zhang
Keyword(s):  
Numerical Simulation ◽  
Comparative Analysis ◽  
Theoretical Foundation ◽  
Region Of Interest ◽  
Polymer Flooding ◽  
Recovery Efficiency ◽  
The West ◽  
Polymer Injection ◽  
Water Cut ◽  
The Relationship

According to the feature of the second oil layer in the west block of Beierxi, this paper investigated the relationship between the permeability contrast and the recovery efficiency, and the relationship between the permeability contrast and the descent range of water cut of polymer flooding, using the numerical simulation. From the comparative analysis of the development effect with different methods of polymer-injection, it got the boundary of the interlayer permeability contrast of the positive and inverted rhythm layer in the second oil layer with the separated zone and separated quality polymer-injection respectively. That provided certain theoretical foundation for carrying on the polymer flooding in the region of interest.

Damage Detection for Offshore Platforms Based on Modal Redundancy Index of Damaged Member

2013 ◽  
Vol 663 ◽  
pp. 109-115
Author(s):  
Wei Zhang ◽  
Xiang Shi ◽  
Xiao Long Xu
Keyword(s):  
Numerical Simulation ◽  
Damage Detection ◽  
Strain Energy ◽  
Engineering Application ◽  
Offshore Platforms ◽  
Different Types ◽  
Reference Index ◽  
The Relationship ◽  
Redundancy Index ◽  
Strain Energy Method

According to the phenomenon that global damage detection of jacket platform is influenced by structure redundancy of damaged member, the concept of modal redundancy index (MRI) of damaged member is proposed. Through numerical simulation by means of mode strain energy method, the way that MRI of damaged members in different types and positions changed was studied, as well as the relationship between MRI and global damage detection. The numerical simulation result demonstrated that when MRI of pile element is less than 2.1×103, damage can be detected; when MRI of slanted brace element is less than 1.5×105, damage can be detected; when MRI of horizontal brace element is more than 5.8×105, damage cannot be detected. Therefore MRI can be a reference index in engineering application of global damage detection of offshore platforms.

scholarly journals Evaluation of Polymer Alternating Waterflooding in Multilayered Heterogeneous Waterflooded Reservoir

2018 ◽  
Vol 171 ◽  
pp. 04001
Author(s):  
Warut Tuncharoen ◽  
Falan Srisuriyachai
Keyword(s):  
Numerical Simulation ◽  
Viscous Fluid ◽  
Polymer Solution ◽  
Oil Recovery ◽  
High Viscosity ◽  
Polymer Flooding ◽  
Operating Parameters ◽  
Sweep Efficiency ◽  
Polymer Injection ◽  
Water Breakthrough

Polymer flooding is widely implemented to improve oil recovery since polymer can increase sweep efficiency and smoothen heterogeneous reservoir profile. However, polymer solution is somewhat difficult to be injected due to high viscosity and thus, water slug is recommended to be injected before and during polymer injection in order to increase an ease of injecting this viscous fluid into the wellbore. In this study, numerical simulation is performed to determine the most appropriate operating parameters to maximize oil recovery. The results show that pre-flushed water should be injected until water breakthrough while alternating water slug size should be as low as 5% of polymer slug size. Concentration for each polymer slugs should be kept constant and recommended number of alternative cycles is 2. Combining these operating parameters altogether contributes to oil recovery of 53.69% whereas single-slug polymer flooding provides only 53.04% which is equivalent to 8,000 STB of oil gain.

Numerical Simulation of Polymer Injection in Turbulent Flow Past a Circular Cylinder

2011 ◽  
Vol 133 (10) ◽  
Author(s):  
David Richter ◽  
Eric S. G. Shaqfeh ◽  
Gianluca Iaccarino
Keyword(s):  
Numerical Simulation ◽  
Circular Cylinder ◽  
High Reynolds Number ◽  
Turbulent Energy ◽  
Viscoelastic Flows ◽  
Primary Vortex ◽  
Near Wake ◽  
Polymer Injection ◽  
Newtonian Flows ◽  
High Reynolds

Using a code developed to compute high Reynolds number viscoelastic flows, polymer injection from the upstream stagnation point of a circular cylinder is modeled at Re=3900. Polymer stresses are represented using the FENE-P constitutive equations. By increasing polymer injection rates within realistic ranges, significant near wake stabilization is observed. Rather than a turbulent detached shear layer giving way to a chaotic primary vortex (as seen in Newtonian flows at high Re), a much more coherent primary vortex is shed, which possesses an increased core pressure as well as a reduced level of turbulent energy.

Numerical Simulation of Crossed-Linked Polymer Injection in Dina Cretaceous Field: A Real Field Case Study

2020 ◽  
Author(s):  
Mehdi Izadi ◽  
Jaime Alberto Jimenez ◽  
Jose Francisco Zapata ◽  
Andres Felipe Castillo ◽  
John Pinto ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Real Field ◽  
Polymer Injection ◽  
Field Case
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